Define the External Host
The external host is simply the address of the login page. In this example, it is www.example.com. Be sure to provide a meaningful name in the Virtual Host Name field. This value is used instead of the actual host name when you define the symbolic URL. This makes administration easier if the host name changes. Also notice that there is no value for the Authentication Type.
The following figure shows the external host defined for this example where Name is www.siebel.com and Virtual Name is SIEBEL.

For more information, see Defining the External Host.